Intelligent control system and method for back-up source of fan variable-pitch system

Abstract

The invention provides an intelligent control system for a back-up source of a fan variable-pitch system. The intelligent control system comprises a fan real demand calculating module, a super-capacitor actual capacity calculating module and a super-capacitor intelligent control module; the fan real demand calculating module is connected with a variable-pitch motor and used for collecting wind speed data of pitch varying of a fan in a wind field, acquiring energy consumed in the feathering process of the variable-pitch motor, and calculating a real demand value of fan feathering for super-capacitor stored energy under the maximum design wind speed; the super-capacitor actual capacity calculating module is electrically connected with a super-capacitor to collect charge and discharge information of the super-capacitor and calculate the current actual capacitance of the super-capacitor; and the super-capacitor intelligent control module is in signal connection with the fan real demand calculating module and the super-capacitor actual capacity calculating module and is electrically connected with the super-capacitor to control the charge voltage of the super-capacitor according to thereal demand value and the current actual capacitance of the super-capacitor, predict the remaining usage time of the super-capacitor and judge whether the super-capacitor needs to be replaced or not.The invention further provides an intelligent control method for the back-up source of the fan variable-pitch system.

Description

technical field [0001] The invention relates to the field of fan pitch systems, in particular to an intelligent control system and method for a backup power supply of the fan pitch system. Background technique [0002] The technology of wind power generation is becoming more and more mature, and the cost is decreasing continuously. It is currently the largest new energy power generation method with the largest application scale. The pitch system is an important control and protection device for wind turbines (referred to as wind turbines). The pitch system is mainly composed of a pitch driver, a motor, and a backup power supply. The task of the backup power supply is to provide energy for the pitch control system when the power grid is abnormal, feather the blades to a safe position, and realize the air braking of the fan. If the energy stored in the backup power supply cannot meet the feathering requirements, then when the power grid is abnormal, the blades will not be fea...

AI Technical Summary

Problems solved by technology

However, if the result of the simulation calculation is too large, it will cause waste of resources and increase costs

[0013] 2) The scheme of constant supercapacitor charging voltage is not the optimal scheme

[0015] 3) It is unreasonable to use a fixed attenuation ratio as an indicator that the supercapacitor needs to be replaced

Replacing the supercapacitor at this time will cause waste of resources and increase operation and maintenance costs

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